Rick Rubin recalled Cash's recording of the song in a Genius
"I played him a lot of old songs, like 'Ain't No Grave (Gonna Hold This Body Down).' I think I played it to him from an old field recordings collection. We were going to do an album of black spirituals, so I did a lot of research and played him a lot of stuff for that.
There were six versions of 'Ain't No Grave,' and they were all different. His voice was deteriorating over the process, and that became an interesting character in it.
The last one is kind of hard to listen to. It's very beautiful but the combination of where his voice is at and the lyrics being so sad, it's hard to take."